@usernv do you have some input on this?
I would have assumed windows to not be able to handle multiple virtual ports on 1 physical port correctly, but as the camera can be pinged I cant help but think that CVB somehow has a problem here.
@zhouchuang0311 meanwhile you could try to go with the discover interface:
https://forum.commonvisionblox.com/t/api-device-discovery-with-allow-broadcast-acknowledge-ignore-subnet/1260
And try if this gives you more devices (very unlikely though but still worth a try)